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Unread 13-12-2014, 12:01
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Re: pic: 2851 2014 off-season design: Bottom view with electronics

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Originally Posted by cfair View Post
That's a nice looking chassis. I don't have the experience with sheet metal to say whether it's enough or not, but i like your T-shaped bottom plate, and if that's a piece of lexan on top, it could help a lot too. Box structures are good, and box structures made out of box structures are really good. Nice chassis! Can't see what you're doing for gearboxes...
Thanks! We would be using VEXpro single stage double reduction gearboxes geared at something like 21 ft/s because it's what we already have, and we also want this robot to be relatively cheap.
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Unread 13-12-2014, 12:15
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Re: pic: 2851 2014 off-season design: Bottom view with electronics




Here is a simple CAD of our West Coast Chassis with the drop down e-plates cfair was talking about. We have two e-plates on this robot, and both are able to be dropped. However, in this CAD I only dropped down one to show what one e-plate would look like when it is not dropped.

wyrzykowskij1 also asked what the dimensions of this robot are. Currently we are at 29.5 inches x 26.25 inches.
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Unread 13-12-2014, 12:21
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Re: pic: 2851 2014 off-season design: Bottom view with electronics

That chassis looks really good. Do you think the corner supports on the inside are enough to counteract forces from corner hits and shear? Also, What made you go with (almost) square?
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Unread 13-12-2014, 15:17
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Re: pic: 2851 2014 off-season design: Bottom view with electronics

Is it strong enough? Time will tell. The chassis is inspired by (blatant ripoff of) team 3256, the warriorborgs. That's where we got the idea for the upper level that supports bumpers and provides an interface to the game-piece manipulator. That upper level doesn't have any gussets, but it's welded, and we expect our game-specific device (we call it an EVOM) to provide some stiffness once it's installed. We have 0.75" square cross members in our pocket for the upper center (same function the AM churros provided on one of their chassis) depending on what happens with the EVOM. We are also looking forward to much nicer bumper fasteners: quick-release pins!

If it's going to fail, I would expect the welds for the corner verticals to go first.
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Unread 13-12-2014, 18:47
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Re: pic: 2851 2014 off-season design: Bottom view with electronics

I see. There is definitely a lot of room in this design for peripheral mechanisms, and I would imagine this could be converted to other shapes if needed depending on the game. I like it.
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